describe cnidarians
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CNIDARIANS: SIMPLE ANIMALS WITH A STING! The Cnidarians include the hydroids, jellyfish, anemones, and corals. All Cnidarians have tentacles with stinging cells in their tips which are used to capture and subdue prey. In fact, the phylum name Cnidarian literally means stinging creature..The stinging cells are called cnidocytes and contain a structure called a nematocyst. The nematocyst is a coiled thread-like stinger.n fact, the phylum name Cnidarian literally means stinging creature.. The stinging cells are called cnidocytes and contain a structure called a nematocyst. The nematocyst is a coiled thread-like stinger.
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Cnidaria: More on Morphology Cnidarians are said to be the simplest organisms at the tissue grade of organization. Their cells are organized into true tissues. Cnidarians are essentially bags made of two cell layers. The outer layer, or epidermis, contains the cnidocysts, the stinging cells that are characteristic of the phylum.nidarians are said to be the simplest organisms at the tissue grade of organization. Their cells are organized into true tissues. Cnidarians are essentially bags made of two cell layers. The outer layer, or epidermis, contains the cnidocysts, the stinging cells that are characteristic of the phylum.
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Hydra and Other Cnidarians The hydra belongs to a group of organisms known as. or sometimes called coelenterates. This phylum also includes animals such as the jellyfish and sea anemone and the organisms that make up coral reefs. The common characteristic to all of these animals is that they have stinging cells located, known as.
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- Nematocysts are the stinging cells on tentacles of a cnidarian, like a jellyfish. Since jellyfish don't have any teeth, and their body consists of gelatin, it's hard to captur … e prey.Nematocysts help jellyfish with feeding by stinging the prey in an attempt at trying to immobilizing the prey.hat is a Cnidarian? cnidarians, such as jelly fish, sea anemones, hydra, and corals, have tentacles surrounding their mouth. they are a hollow-bodied animal with two celled layers that are organ … ized into tissues. the inner layer forms a digestive cavity where food is broken down.
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General Biology/Print version Cnidaria. Cnidaria is a phylum containing over 9,000 species found only in aquatic and mostly marine environments. All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa.Sea anemones and corals have the polyp form, while jellyfish are typical medusae.When you look at them, you can see that these body forms are the same except that one is upside down.here are two major body forms among the Cnidaria-the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae. When you look at them, you can see that these body forms are the same except that one is upside down.
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Animals 1.3 Sponges and Cnidarians the immature form of an animal that looks very different from the adult. cnidarian An invertibrate animal that uses stinging cells to capture food and defend itself polyp the cnidarian body plan charcterized by a vaselike shape and which is usually adapted for life attatched to an underwater surface.
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Cnidaria Most cnidarians prey on organisms ranging in size from plankton to animals several times larger than themselves, but many obtain much of their nutrition from endosymbiotic algae, and a few are parasites. Many are preyed on by other animals including starfish, sea slugs, fish and turtles.ossil cnidarians have been found in rocks formed about 580 million years ago, and other fossils show that corals may have been present shortly before 490 million years ago and diversified a few million years later. Fossils of cnidarians that do not build mineralized structures are very rare.
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Culture Culture (/ˈkʌltʃər/) is, in the words of E.B. Tylor, that complex whole which includes knowledge, belief, art, morals, law, custom and any other capabilities and habits acquired by man as a member of society..n the humanities, one sense of culture, as an attribute of the individual, has been the degree to which they have cultivated a particular level of sophistication, in the arts, sciences, education, or manners.
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What are the Major Groups of Cnidarians? Cnidarians, members of phylum Cnidaria, are among the simplest and most basal animals, splitting off from other phyla even before sponges did, as was discovered by molecular studies in 2008. They are among the earliest animal fossils with recognizable affinity to modern groups.ike other members of this phyla, corals can reproduce either asexually, by budding, or sexually, by releasing sperm into the water. These organisms have two major body forms: the polyp, which is a stalk with cnidocytes at its top, or the medusa, which is the iconic shape of the jellyfish.
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General Biology/Print version Cnidaria. Cnidaria is a phylum containing over 9,000 species found only in aquatic and mostly marine environments. All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa.Sea anemones and corals have the polyp form, while jellyfish are typical medusae.When you look at them, you can see that these body forms are the same except that one is upside down.ll cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae. When you look at them, you can see that these body forms are the same except that one is upside down.
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What Does Cnidaria Eat? Cnidaria is a phylum of sea-dwelling animals that includes sea anemones, coral, jellyfish and hydra. Sea anemones and coral have a body shape known as a polyp, and are generally stationary, while jellyfish and hydra are medusae, and are able to move through the water. With these differences, it might come as no ...
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Cnidariaâ Overview Cnidarians are a diverse group of aquatic animals. More than 9,000 species are part of the Phylum Cnidaria, and all species are aquatic.Cnidarians are widespread in marine habitats and less common in fresh water.nidarians are a diverse group of aquatic animals. More than 9,000 species are part of the Phylum Cnidaria, and all species are aquatic.
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- Cnidaria is a phylum within Kingdom Animalia which consists of hydras, jellies (or jellyfish), sea anemones, and corals. All cnidarians are radially symmetrical, and there are two main radially symmetrical body types.
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- Cnidarians are a group of invertebrates that includes jellyfish, corals, sea anemones, and hydras.There are between 8,000 and 9,000 species of cnidarians alive today. The articles listed below provide information about the characteristics, classification and evolution of cnidarians.nidarians are a group of invertebrates that includes jellyfish, corals, sea anemones, and hydras.
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- cnidarians, such as jelly fish, sea anemones, hydra, and corals, have tentacles surrounding their mouth. they are a hollow-bodied animal with two celled layers that are organ … ized into tissues. the inner layer forms a digestive cavity where food is broken down. All Cnidarians are aquatic and carnivorous, and they occur in two basic body shapes: polyps,…. 2  Characteristics of Cnidaria Cnidaria is an alternative name for the invertebrate phylum Coelenterata, giving emphasis to the stinging structures as characteristic of the phylum.
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Unit 8 (they have eyes). All of the following are characteristic of cnidarians except a. they have a gastrovascular cavity with one opening. b. their body form consists of a polyp or medusa. c. they have a simple nervous system. d. they are primarily filter feeders. e. they have eyes.
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Cnidarians Box Jellyfish. Phylum Cnidaria. Cnidaria is a large phylum composed of some of the most beautiful of all the salt and freshwater organisms: the true jellyfish, box jellyfish, coral and sea anemones, and hydra.Although Cnidaria is an incredibly diverse group of animals, there are several traits that link them together.ox Jellyfish. Phylum Cnidaria. Cnidaria is a large phylum composed of some of the most beautiful of all the salt and freshwater organisms: the true jellyfish, box jellyfish, coral and sea anemones, and hydra.
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Cnidaria Coral are medusoid marine animals that are in the phylum cnidaria. Most of the coral population is in large groups at the sea floor. A coral head is a colony of myriad genetically similar polyps. Each polyp is a spineless animal typically very small.ellyfish are polypoid, free-swimming members of the phylum Cnidaria. Jellyfish are invertebrates. that means they have no bones, exoskeleton, or shell to protect them. the majority of their body is made up of water.
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Cnidaria The exclusively aquatic phylum Cnidaria is represented by polyps such as sea anemones and corals, and by medusae such as jellyfish. A polypoid or a medusoid cnidarian is a radially or biradially symmetrical, uncephalized animal with a single body opening, the mouth.he exclusively aquatic phylum Cnidaria is represented by polyps such as sea anemones and corals, and by medusae such as jellyfish. A polypoid or a medusoid cnidarian is a radially or biradially symmetrical, uncephalized animal with a single body opening, the mouth.
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A Guide to the Cnidarians For example, many jellyfish have four oral arms that extend below their body and their body structure can therefore be divided into four equal parts. This type of radial symmetry is referred to as tetramerism. Additionally, two groups of cnidarians, corals and sea anemones, exhibit six-or eight-fold symmetry.
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Cnidaria corals, sea anemones, jellyfish, and relatives Cnidariacorals, sea anemones, jellyfish, and relatives. The Phylum Cnidaria includes such diverse forms as jellyfish, hydra, sea anemones, and corals. Cnidarians are radially or biradially symmetric, a general type of symmetry believed primitive for eumetazoans.
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Cnidaria Fossil cnidarians have been found in rocks formed about 580 million years ago, and other fossils show that corals may have been present shortly before 490 million years ago and diversified a few million years later. Fossils of cnidarians that do not build mineralized structures are very rare.ost cnidarians prey on organisms ranging in size from plankton to animals several times larger than themselves, but many obtain much of their nutrition from endosymbiotic algae, and a few are parasites. Many are preyed on by other animals including starfish, sea slugs, fish and turtles.
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Cnidarians 4. Cnidarians have an ectoderm and endoderm, both of which are germ layers. Animals with only two germ layers are called diploblastic animals. The ectoderm produces the epidermis and the endoderm produces the covering of the digestive cavity. 1  Image Diversity: germ layers.
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- Cnidaria A phylum that comprises the sea anemones, jellyfish, and corals, and which is known from the late Precambrian. Cnidarians are basically radially symmetrical and have tentacles. The body contains a gastrovascular cavity and the body wall is diploblastic.nidaria A phylum that comprises the sea anemones, jellyfish, and corals, and which is known from the late Precambrian. Cnidarians are basically radially symmetrical and have tentacles. The body contains a gastrovascular cavity and the body wall is diploblastic.
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Introduction to Cnidaria Jellyfish, corals, and other stingers. Cnidarians are incredibly diverse in form, as evidenced by colonial siphonophores, massive medusae and corals, feathery hydroids, and box jellies with complex eyes.Yet, these diverse animals are all armed with stinging cells called nematocysts.Cnidarians are united based on the presumption that their nematocysts have been inherited from a single common ancestor. The name Cnidaria comes from the Greek word cnidos, which means stinging nettle.et, these diverse animals are all armed with stinging cells called nematocysts. Cnidarians are united based on the presumption that their nematocysts have been inherited from a single common ancestor. The name Cnidaria comes from the Greek word cnidos, which means stinging nettle.
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Cnidaria Cnidaria are diploblastic animals, in other words they have two main cell layers, while more complex animals are triploblasts having three main layers. The two main cell layers of cnidarians form epithelia that are mostly one cell thick, and are attached to a fibrous basement membrane, which they secrete.n the Cnidaria sexual reproduction often involves a complex life cycle with both polyp and medusa stages. For example, in Scyphozoa (jellyfish) and Cubozoa (box jellies) a larva swims until it finds a good site, and then becomes a polyp.
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- Cnidaria (nīdar´nīdâr) ēə Or (coelenterata´səlĕntərae) , səlĕntərä tə phylum of invertebrate animals comprising the, sea, anemones, corals jellyfish. And hydroids cnidarians are (radially symmetrical, see). symmetry biologicalnidaria (Coelenterata) Phylum comprising the sea anemones, jellyfish, and corals, which is known from the late Precambrian. The Ediacaran fauna from southern Australia, from between 680 and 580 Ma ago, includes clearly identifiable jellyfish and their allies. Corals occur for the first time in Ordovician rocks.